Ventilation

[kela1]

If there is a formula to find the pressure drop, if is given the number of rotation of the fan and the air supply volume

 

[MintJulep]

No.

 

[willard3]

No

 

[lukaiENG]

if only it were that simple... we would all be out of jobs!

 

[berkshire]

Read up on fan laws one and two.
B.E.

You are judged not by what you know, but by what you can do.

 

[chicopee]

Get the original fan characteristic curve (Static pressure vs Air flow) from the manufacturer then apply fan laws.

 

[GT-EGR]

If you have the fan speed/RPM, and you have the fan curve at that fan speed (this is fan specific, from the manufacturer) - the answer is yes, you can easily find the static pressure on your chart.

The fan curve is basically a graph of CFM vs static pressure (with a bunch of other info).

But this only gives you the total static pressure that the fan can overcome - it’s not going to tell you how much static pressure your duct system imposes, that would vary widely depending on how big/small your ducts are, how much ductwork you have, what devices are in the ductwork, etc.

If you are looking for specific pressure drops in your duct system, that has little to do with the fan itself.